Engine swap question...

[Solini]

Just curious say I was able to get my hands on a F50 engine what all would I have to do to make it fit into a y33???? Always wanted to ask, figured now was a good time to ask

[Rex]

Expect lots of custom (read $$$$) fabrication and wiring work, but it's not illegal, as it's a newer motor offered int he same car ... though there may be some issue as it's offered in a different chassis???

IMHO, I think you'd be better to sell the F50 motor and build a twin turbo set up for the VH41, but that's just me .

[elwesso]

personally i would never go from a OBDII engine to a more complex OBDII engine... I wonder if the VKs over in japan are OBDI?

[maxnix]

I like the idea of a FY33 with a good VK45DE and the five speed automatic.

I would start by looking to see if the F50 ECU and TCU will plug in properly to the FY33 harness. If not, lots of expensive work to replace the harness.

Next I would do the same for the shift gate. Then it's to the tape. The F50 and FY33 floor plan are very close, so it might work with a F50 drive shaft.

Perhaps most intriguing, this should be a very quick car off the line with the FY33 differential which is considerably shorter. You may want to source a later F50 3.13 differential.

[elwesso]

Personally I think it would be a lot easier to use a VH with the 5 speed auto.. The VK is probably gonna need new mounts made, the VH wont.....

Instead of having to rewire the entire motor, you will just have to rewire stuff relavent to the trans.. The trick isnt getting the trans to shift (anyone can wire it up to shift right), the trick is getting the engine to retard the timing during shifts...

I think it would be a nightmare to try and get it to work right... Getting it to work is one thing, getting it to work like the factory would have is a huge undertaking, and if you dont plan on boosting the car or putting out big HP, its gonna be a lot of wasted effort for like 50-60HP and another gear...

Getting a turbo setup to work on the VH with the stock trans as it sits isnt gonna be hard, PLUS you could convert to OBDI if you wanted to but with GReddy Emanage and SAFCII you should be OK.

[Q45tech]

Facilatating the commission of a Felony.

Big no no to install a larger displacement engine than was certified.

One thing to comply [it passes the numbers for the year in question] with a measured dyno emission test, another to tamper with OBD2 which reports engine size to emission computer via the VIN.

The OBD2 data base [master computer in State] will catch you if you swap ecu/engines. This was a Federal requirement that this sort of thing be caught in waiving the dyno test part in post 1995 units.

[Solini]

Facilatating the commission of a Felony.

Big no no to install a larger displacement engine than was certified.

One thing to comply [it passes the numbers for the year in question] with a measured dyno emission test, another to tamper with OBD2 which reports engine size to emission computer via the VIN.

The OBD2 data base [master computer in State] will catch you if you swap ecu/engines. This was a Federal requirement that this sort of thing be caught in waiving the dyno test part in post 1995 units.

So from what I gather from people like Wes and Brian, it's poosible, not the easiest thing in the world but possible. But also a federal offense . Thanks you guys, I appreciate it. Wes you said a VK, is that the one from a G50, excuse me, i'm not up on the engine lingo

[Rex]

So from what I gather from people like Wes and Brian, it's poosible, not the easiest thing in the world but possible. But also a federal offense . Thanks you guys, I appreciate it. Wes you said a VK, is that the one from a G50, excuse me, i'm not up on the engine lingo

Here's some info for ya.

Infiniti published numbers*90-96 Q45 (G50) - VH45DE - 278HP/292TQ (ex.1996, the elimination of VVT lowered the numbers.)97-01 Q45 (Y33) - VH41DE - 266HP/278TQ02-up Q45 (F50) - VK45DE - 340HP/333TQ

The layout for Nissan/Inifiniti engines is letter/letter/number/number/letter/letter/letter the first 2 letters designate the engine series (i.e. VH, VH, RB, SR, KA, FJ, LB, etc) the 2 numbers designate the displacement in liters. There may be up to 4 letters after the displacement that designate the valve train type - D = DOHC, V = VVT (though it wasn't used on the VH45DE??) (SOHC, is deisgnated by no letter), followed by the fuel system - E = Fuel injected, I = Throttle Body, D = Direct Injection. The next letters would designate what type of forced induction (& quantity ) if present - T = turbo, TT = twin turbo and R = Supercharger.

*It's rumored, that there was a gentlemens agreement amongst Japanese auto manufacturers to not export passeneger vehicles with horse power "ratings" over 300 hp. The agreement seemed to dissolve during the 90's. Keep in mind these are not RWHP numbers.

[maxnix]

Infiniti published numbers*90-96 Q45 (G50) - VH45DE - 278HP/292TQ (ex.1996, the elimination of VVT lowered the numbers.)

Actually, Infiniti never lowered the numbers, and I bet 1996 met these numbers as then rated (no PS pump, AC, etc.), and the other years exceeded them. It is not clear to me if the JDM VH45DE in the later Presidents never lost the VVT, or if it was eliminated after 1995 in that market also. The hosepower ratings did not change from before and after, however.

[Q45tech]

Wasn't the question is it legal to install a 4.5 liter engine in a car that was imported to the US with a 4.1 engine the answer is no because the car will produce more exhaust volume at idle and cruise [where emissions are tested]................more grams per mile of pollution.......the displacement is 9.5% greater.

When you plug into OBD2 emission test computer the VIN and other data is transmitted to computer BEFORE the test is allowed to begin........this engine family data is what convicts you of making the engine change.